Which specific grammar point or are you working on right now?
Most students ignore the listening section. Don't. Japanese is highly phonetic; missing a long vowel or small tsu changes the meaning. If your PDF came without audio, buy the official audio CD or MP3 download from OMG Japan or White Rabbit Press.
This free website has a massive database of exercises. You can select "Minna no Nihongo 1" as your textbook path. The system will quiz you on particles, verb conjugation, and vocabulary exactly like the workbook does. minna no nihongo 1 exercise book pdf
If you cannot find a legal PDF or simply want a more modern approach, consider these alternatives that replicate the "exercise book" experience without needing a specific file.
Reading a grammar explanation is passive; using it is active. The exercise book forces you to construct sentences, manipulate verb conjugations, and choose the correct particles. If you can understand a sentence but cannot write it yourself, the exercise book exposes that gap immediately. Which specific grammar point or are you working on right now
introduced in the first level. It guides you through stroke order, readings, and writing practice in context. Bunkei Renshucho (Sentence Pattern Workbook)
To get the absolute most out of your Minna no Nihongo 1 workbook, do not just fill it out passively. Follow this proven study workflow: Step 1: Study the Main Textbook & Translation Guide Japanese is highly phonetic; missing a long vowel
Most editions feature a detachable answer booklet for self-graded study. Structure of a Typical Lesson Exercise